Food warmer



FIG. 1 is a front perspective view of a food warmer, showing of a new design, shown with the front door open;

FIG. 2 is a front elevational view thereof shown with the door closed;

FIG. 3 is a rear perspective view thereof shown with the rear doors opened;

FIG. 4 is a rear elevational view thereof shown with the doors closed;

FIG. 5 is a side view thereof;

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a food warmer, as shown and described. 